It's more like what can't you do with one. They are very useful and people use them for everything from 3D printers to monitoring solar systems to running servers, to automating their homes.

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Damn, think you just blew my mind 🤯, that’s kind of amazing. Has a cute name too 🥹

It's just one of many useful, inexpensive microcontrollers (though, the Pi is technically more of a really compact system) that you can use to do things that don't require sounds of computing power.